US4515397A - Vacuum insulated conduit - Google Patents
Vacuum insulated conduit Download PDFInfo
- Publication number
- US4515397A US4515397A US06/481,237 US48123783A US4515397A US 4515397 A US4515397 A US 4515397A US 48123783 A US48123783 A US 48123783A US 4515397 A US4515397 A US 4515397A
- Authority
- US
- United States
- Prior art keywords
- pipe
- conduit
- bellows
- joint
- volume
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/18—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints
- F16L59/185—Adjustable joints, joints allowing movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S285/00—Pipe joints or couplings
- Y10S285/904—Cryogenic
Definitions
- This invention relates, in general, to insulated conduits and more particularly to conduits insulated, at least in part, by vacuum.
- Insulated conduits are used in a wide variety of applications to transport a fluid having a temperature which differs markedly from ambient such that the fluid retains to as great an extent as possible its desired temperature characteristics during the transport.
- Specific examples of such applications are the transport of liquified gases and the transport of molten solids.
- An often-used type of insulated conduit is one wherein the insulation is achieved, at least in part, by a vacuum.
- such a conduit comprises concentric inner and outer pipes wherein the fluid flows in the inner pipe and the space between the pipes is evacuated to provide insulation from ambient conditions.
- Commercial embodiments of such double-walled conduits often employ multilayer laminar radiation shielding between the walls.
- couplings are spaced approximately every thirty feet of fluid transfer conduit.
- a conduit having reduced thermal leakage at a joint area comprising:
- (C) bellows attached at one axial end thereof to said first pipe, having a diameter greater then that of said first pipe but less than that of said second pipe, positioned circumferentially around and axially along said first pipe along at least a part of said axial distance;
- vacuum is used to define a volume having a pressure less than atmospheric.
- bellows is used to mean a metal cylinder which has a thin convoluted wall allowing the cylinder to be extended or compressed along its axis.
- FIG. 1 is a cut away view, partly in cross-section, of the vacuum insulated conduit of this invention connected to another such conduit.
- FIG. 2 is a cross-sectional view of one embodiment of the vacuum insulated conduit of this invention.
- FIG. 3 is a cross-sectional view of another embodiment of the vacuum insulated conduit of this invention.
- FIG. 4 is a graphical representation of the thermal performance characteristics of the vacuum insulated conduit of this invention and also of a conventionally employed commercially available vacuum insulated conduit.
- This invention is an insulated conduit wherein insulation is obtained, at least in part, by a vacuum space between the transported fluid and the ambient conditions.
- ambient conditions it is meant any conditions exterior of the outer concentric pipe, and not necessarily atmospheric conditions.
- the vacuum insulated conduit of this invention exhibits greatly improved thermal resistance over that attained by conventional commercially available vacuum insulated conduits especially when the vacuum is degraded.
- This improved thermal resistance is attained by means comprising a novel conduit end area configuration which reduces heat transfer around the end area when the end area is joined to another such end area to form a conduit joint or connection.
- the novel end area configuration is easily constructed and can be easily joined to another such end area to quickly and conveniently form a joint.
- the end area configuration also allows one to employ inexpensive insulation, such as is normally employed only for atmospheric insulation purposes, to pack the evacuated area of the joint. Furthermore, the end area configuration allows one to achieve improved insulation at lesser degrees of vacuum leading to even further cost savings.
- first pipe 10 through which fluid is transported, and outer or second pipe 14, circumferentially around and axially along pipe 10 but ending at a point 51 short of the first pipe end 52 so as to define an axial distance from 51 to 52.
- Bellows 27 are positioned circumferentially around and axially along the axial distance between point 51 and end 52 and joined to first pipe 10 at their axial end nearer pipe end 52 such as by a butt weld at 28.
- Circular plate 22 is positioned essentially perpendicular to the pipes and has a solid radial dimension from the furthest radial extent of bellows 27 as at 24 to the second pipe 14. Plate 22 is connected to pipe 14, as at 23, and bellows 27, as at 24.
- first pipe 10 and second pipe 14 are evacuated.
- insulation 12 which may be open-celled or fibrous insulation such as would conventionally be employed only at atmospheric pressure and would not normally be deemed suitable for vacuum type insulation duty.
- the vacuum space may be at any suitable pressure from atmospheric to one micron of mercury or less. However, as will be shown more clearly later, the benefits of the conduit of this invention are more beneficially attained when the space is at a pressure of from 1 micron of mercury to atmospheric, and preferably from 10 to 100,000 microns of mercury.
- the vacuum space may also contain adsorbent 34, such as activated carbon molecular sieve or the like, which can serve as the primary or supplementary means to attain the vacuum and can serve as a means of maintaining the vacuum by absorbing gas introduced to the space by leak or material outgassing.
- adsorbent 34 such as activated carbon molecular sieve or the like, which can serve as the primary or supplementary means to attain the vacuum and can serve as a means of maintaining the vacuum by absorbing gas introduced to the space by leak or material outgassing.
- Plate 22 and bellows 27 cooperate to sharply reduce thermal leak from the conduit from the area proximate the end which would serve as one-half of a conduit joint.
- Plate 22 and bellows 27 act to effectively reduce the evacuated volume in the vicinity of a joint such that a degradation in vacuum does not have nearly as severe an impact on heat transfer resistance as would occur with conventional vacuum insulated conduits.
- Plate 22 and bellows 27 also act to reduce heat leak in the joint area by their configuration which requires heat transfer to occur essentially only along the path from the point where bellows 27 are attached to first pipe 10 at 28 to the point where plate 22 is attached to second pipe 14 at 23, along the surface of plate 22 and bellows 27.
- the joint area is preferably packed with insulation.
- insulation 29 which may be molded fiberglass, occupies the evacuated space between bellows 27 and pipe 10 thus inhibiting radial heat transfer.
- Mat wrap 26, which may be of fiberglass or the like, encircles bellows 27 inhibiting convective heat transfer to or from the bellows area and along the length of the bellows.
- the joint area is enclosed by insulation sections 16 and 17 which is preferably rigid closed-cell urethane foam.
- Insulation collar 25, preferably made of molded, closed-cell flexible foam is preferably adhesive-bonded to plate 22 and disposed between plate 22 and insulation 17 to provide axial flexibility.
- mat wrap 26 could be wound in layers to take up the entire space occupied by insulation section 16 and 17. This arrangement is preferable when liquid oxygen is the fluid being transported to avoid material compatibility problems.
- FIG. 2 illustrates a preferred embodiment wherein the end of pipe 10 is outfitted with flange 30 which facilitates joining the end with another such end to form a joint. Alternatively the pipe end could be welded to another such end.
- Fiberglass is the preferred insulation for the insulation between the pipes.
- Other suitable types of insulation include phenolic foam and perlite.
- Outer pipe 14 is preferably constructed of aluminum which has adequate strength and is not expensive.
- Other suitable materials for outer pipe 14 include carbon steel or another metal alloy or a non-metal such as polyethylene.
- Inner pipe 10 is preferably constructed of stainless steel although any other conduit material compatible with the fluid to be transported through pipe 10 is suitable.
- Bellows 27 are preferably metal and most preferably stainless steel.
- Metal plate 22 is preferably of aluminum and is connected to components of similar material by a weld and to components of dissimilar material by suitable adhesive.
- the axial length of bellows 27 is a matter of design within the capability of one skilled in the art. The longer is the the axial length of bellows 27 the greater is the axial flexibility of the conduit and the greater is the conductive axial heat transfer resistance. However, radial convective or radiation heat transfer around the bellows area increases with bellows axial length.
- the radius of the bellows may be any suitable radius although it is preferable that the radius be only sufficiently greater than that of the inner pipe to allow for insulation section 29 between the bellows and the inner pipe.
- the distance between the inner pipe and the bellows is less than 25 percent of the distance between the inner and outer pipes, most preferably from 5 to 20 percent.
- the amplitude of each convolution of the bellows is generally specified by the bellows manufacturer for each standard pipe size.
- the bellows convolution frequency will depend on the degree to which axial flexibility is required. The greater the axial flexibility required the more convolutions per linear dimension which will be needed.
- FIG. 3 illustrates another embodiment of the vacuum insulated conduit of this invention.
- the numerals correspond to those of FIG. 2 for the elements common to both.
- This embodiment shows plate 22 welded to pipe 14 and adhesive bonded to bellows 27.
- Seal 21 is shown as an adhesive-backed heat shrink plastic seal eliminating the need for compression bands.
- High density fiberglass disk 31 is provided to help center inner first pipe 10 within outer second pipe 14.
- Valve 35 is shown which may be used to evacuate the joint area or to fill the area up to atmospheric pressure with a low conductivity gas such as carbon dioxide or argon.
- FIG. 1 illustrates the vacuum insulated conduit of this invention joined to another such conduit at their respective end areas to form a conduit joint.
- the numerals of FIG. 1 correspond to those of FIG. 2 for the common elements.
- Relief valves 36 and 37 are provided to release excessive pressure in case of inner pipe 10 or joint failure.
- FIG. 4 is a graph showing the insulating performance of the vacuum insulated conduit of this invention, represented by Curve A, and also that of a conventional commercially available vacuum insulated conduit with multilayer radiation shielding, represented by Curve B.
- the data was calculated based on performance estimates for a vacuum insulated conduit similar to that of FIG. 2 having a two-inch diameter inner pipe, a length of 30 feet and one joint.
- the vacuum insulated conduit of this invention one can achieve better insulation at less stringent vacuum conditions than were heretofore necessary thus achieving considerable cost savings. Since the vacuum need not be as stringent for comparable insulating performance, one can maintain the vacuum at less cost such as by employing adsorbent rather than an expensive getter package, such as barium or palladium oxide, in the evacuated space. Also, low cost atmospheric-type insulation is used in place of high cost radiation shielding. The atmospheric-type insulation effectively centers the inner pipe and, eliminates the need for spacers which are costly to construct and are a source of high heat leak. Furthermore, costly vacuum pumping time is considerably reduced. Still further, many costly and time consuming construction and maintenance techniques and procedures can be reduced or eliminated due to the lesser degree of vacuum which can be tolerated by the vacuum insulated conduit of this invention.
Abstract
Description
Claims (18)
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/481,237 US4515397A (en) | 1983-04-01 | 1983-04-01 | Vacuum insulated conduit |
BR8406495A BR8406495A (en) | 1983-04-01 | 1984-04-02 | CONDUCT WITH REDUCED THERMAL EXHAUST IN A JUNCTION AREA; |
JP59501607A JPS60500968A (en) | 1983-04-01 | 1984-04-02 | Vacuum insulated conduit |
EP84103622A EP0123944B1 (en) | 1983-04-01 | 1984-04-02 | Vacuum insulated conduit |
PCT/US1984/000481 WO1984003929A1 (en) | 1983-04-01 | 1984-04-02 | Vacuum insulated conduit |
CA000451100A CA1210342A (en) | 1983-04-01 | 1984-04-02 | Vacuum insulated conduit |
ES1984291537U ES291537Y (en) | 1983-04-01 | 1984-04-02 | A DUCT PROVISION THAT HAS A REDUCED THERMAL LEAK IN A JOINT AREA |
MX200878A MX158379A (en) | 1983-04-01 | 1984-04-02 | VACUUM ISOLATED DUCT |
DE8484103622T DE3468269D1 (en) | 1983-04-01 | 1984-04-02 | VACUUM INSULATED CONDUIT |
NO844612A NO844612L (en) | 1983-04-01 | 1984-11-20 | VACUUM-INSULATED PIPE PIPE |
DK572384A DK572384A (en) | 1983-04-01 | 1984-11-30 | VACUUM-INSULATED WIRE |
FI844731A FI844731A0 (en) | 1983-04-01 | 1984-11-30 | VACUUM SOLARS ROERLEDNING. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/481,237 US4515397A (en) | 1983-04-01 | 1983-04-01 | Vacuum insulated conduit |
Publications (1)
Publication Number | Publication Date |
---|---|
US4515397A true US4515397A (en) | 1985-05-07 |
Family
ID=23911177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/481,237 Expired - Fee Related US4515397A (en) | 1983-04-01 | 1983-04-01 | Vacuum insulated conduit |
Country Status (11)
Country | Link |
---|---|
US (1) | US4515397A (en) |
EP (1) | EP0123944B1 (en) |
JP (1) | JPS60500968A (en) |
BR (1) | BR8406495A (en) |
CA (1) | CA1210342A (en) |
DE (1) | DE3468269D1 (en) |
ES (1) | ES291537Y (en) |
FI (1) | FI844731A0 (en) |
MX (1) | MX158379A (en) |
NO (1) | NO844612L (en) |
WO (1) | WO1984003929A1 (en) |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4746147A (en) * | 1987-04-09 | 1988-05-24 | Ecw, Inc. | Pipe joint |
US4798405A (en) * | 1987-09-22 | 1989-01-17 | Mobil Oil Corporation | Assembly for electrically non-conductively interconnecting tube ends |
US5014752A (en) * | 1987-05-27 | 1991-05-14 | Zojirushi Vacuum Bottle Co., Ltd. | Nonfreezing pipe |
EP0459085A1 (en) * | 1990-05-18 | 1991-12-04 | Deutsche Aerospace AG | Joining method for vacuum-thermal insulation elements |
WO2000025054A1 (en) * | 1998-10-28 | 2000-05-04 | Mve, Inc. | Vacuum insulated pipe |
US6094922A (en) * | 1998-09-09 | 2000-08-01 | Ziegler; Alex R. | Vacuum-insulated refrigerant line for allowing a vaccum chamber system with water-vapor cryocoil compressor to be locatable outside cleanroom |
US6216745B1 (en) * | 1998-10-28 | 2001-04-17 | Mve, Inc. | Vacuum insulated pipe |
US6533334B1 (en) | 1999-10-13 | 2003-03-18 | Chart Inc. | Vacuum-jacketed bayonet pipe spool and pipe spool system for cryogenic fluid |
US6695358B2 (en) | 1999-10-13 | 2004-02-24 | Chart, Inc. | Controlled leak cryogenic bayonet pipe spool and system |
US20040178626A1 (en) * | 2003-03-11 | 2004-09-16 | Salvador Segreto | Insulated tubular assembly |
US6815026B2 (en) | 2002-11-07 | 2004-11-09 | Perry Philp | Helically-wound duct |
US20040239108A1 (en) * | 2003-04-02 | 2004-12-02 | Chart Industries Inc. | Fluid piping system and pipe spools suitable for sub sea use |
US20050011574A1 (en) * | 2002-03-25 | 2005-01-20 | Michihiko Watanabe | Vacuum-insulated pipe |
US20050218752A1 (en) * | 2004-03-30 | 2005-10-06 | Bray James W | System and method for cooling a super-conducting device |
US20060054234A1 (en) * | 2004-09-16 | 2006-03-16 | White Norman H | Cryogenic piping system |
US20060175828A1 (en) * | 2004-07-20 | 2006-08-10 | Stuart Motew | Cryogenic seal for vacuum-insulated pipe expansion bellows |
US20070164246A1 (en) * | 2005-12-09 | 2007-07-19 | Stephan Lange | Line pipe for the transport of deep-frozen media |
WO2008156496A1 (en) | 2007-06-19 | 2008-12-24 | Praxair Technology, Inc. | Vacuum insulated piping assembly method |
US20100243095A1 (en) * | 2009-03-17 | 2010-09-30 | Remi Bourlart | Thermally insulating protection element for piping |
US20100276127A1 (en) * | 2009-04-30 | 2010-11-04 | Thermal Structures, Inc. | Metal silicone hybrid insulating structures and methods therefor |
US20140001746A1 (en) * | 2012-07-02 | 2014-01-02 | Varian Semiconductor Equipment Associates, Inc. | Vacuum Insulated Fitting Enclosure |
US8991437B2 (en) | 2009-03-17 | 2015-03-31 | Daher Aerospace | Composite protective element for a thermally insulated pipe |
US9512772B2 (en) | 2013-09-16 | 2016-12-06 | KATCON USA, Inc. | Flexible conduit assembly |
WO2019040885A1 (en) * | 2017-08-25 | 2019-02-28 | Reid Aarne H | Multiple geometry and multiple material insulated components |
US10495250B2 (en) | 2012-10-03 | 2019-12-03 | Concept Group, Llc | Vacuum insulated structure with end fitting and method of making same |
US10497908B2 (en) | 2015-08-24 | 2019-12-03 | Concept Group, Llc | Sealed packages for electronic and energy storage devices |
US10723538B2 (en) | 2014-02-20 | 2020-07-28 | Concept Group Llc | Vacuum insulated articles and methods of making same |
US10823326B2 (en) | 2016-11-15 | 2020-11-03 | Concept Group Llc | Enhanced vacuum-insulated articles with controlled microporous insulation |
US11008153B2 (en) | 2016-11-15 | 2021-05-18 | Concept Group Llp | Multiply-insulated assemblies |
CN112833278A (en) * | 2020-12-30 | 2021-05-25 | 南方科技大学 | Composite structure heat insulation pipe and use method thereof |
US11339912B2 (en) | 2018-12-18 | 2022-05-24 | Nexans | Coupling for fluid-conducting lines |
US11702271B2 (en) | 2016-03-04 | 2023-07-18 | Concept Group Llc | Vacuum insulated articles with reflective material enhancement |
US11846381B2 (en) * | 2021-12-23 | 2023-12-19 | VAMMI S.r.l. | Method of restoring a tubular assembly |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3600028C1 (en) * | 1986-01-02 | 1987-01-08 | Witzenmann Metallschlauchfab | Device for the elastic connection of two jacket pipes |
JPH01117759U (en) * | 1988-01-28 | 1989-08-09 |
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US1565254A (en) * | 1924-04-01 | 1925-12-15 | Bystrom Albert Leonard | Pipe covering |
US2478552A (en) * | 1945-12-08 | 1949-08-09 | Alexander H Isenberg | Insulated pipe terminal |
US2930407A (en) * | 1957-06-10 | 1960-03-29 | Conley John | Insulated piping |
US3068026A (en) * | 1958-06-13 | 1962-12-11 | Gen Motors Corp | Cryogenic fluid transfer line coupling |
US3146005A (en) * | 1961-12-04 | 1964-08-25 | Arrowhead Products | Vacuum insulated conduits and insulated joining means |
US3207533A (en) * | 1963-01-17 | 1965-09-21 | Donald A Van Gundy | Double bayonet insulated transfer line coupling |
US3344803A (en) * | 1964-11-19 | 1967-10-03 | Commissariat Energie Atomique | Device for connecting and sealing-off between two sections of a pipeline for conveying liquefied gas |
US3369826A (en) * | 1961-08-22 | 1968-02-20 | Union Carbide Corp | Cryogenic fluid transfer conduit |
US3488067A (en) * | 1967-09-12 | 1970-01-06 | Gilbert Associates | Air cooled pipe penetrations in concrete walls |
US3744823A (en) * | 1971-03-01 | 1973-07-10 | Shaw Pipe Ind Ltd | High temperature pipeline joints |
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US4046407A (en) * | 1975-04-18 | 1977-09-06 | Cryogenic Technology, Inc. | Elongated cryogenic envelope |
FR2465947A1 (en) * | 1979-09-26 | 1981-03-27 | Bonnet Rene | Insulated box for pipeline valves and fittings - has metallic outer casing retaining insulating material with inner and outer split collars around enclosed pipeline |
US4332401A (en) * | 1979-12-20 | 1982-06-01 | General Electric Company | Insulated casing assembly |
US4415184A (en) * | 1981-04-27 | 1983-11-15 | General Electric Company | High temperature insulated casing |
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US3360001A (en) * | 1965-03-17 | 1967-12-26 | James H Anderson | Vacuum jacketed pipe line and joint construction therefor |
JPS5256437A (en) * | 1975-10-27 | 1977-05-09 | Hitachi Cable Ltd | Heat-insulating vacuum double tube |
JPS53128058A (en) * | 1977-04-14 | 1978-11-08 | Nippon Oxygen Co Ltd | Heat insulated vacuum tank for storing low temperature liquid gas |
JPS57129996A (en) * | 1981-02-05 | 1982-08-12 | Nippon Kokan Kk | Vacuum and adiabatic pipings mechanism |
JPS57173691A (en) * | 1981-04-20 | 1982-10-26 | Tokyo Shibaura Electric Co | Multi-layer heat insulating panel and manufacture thereof |
-
1983
- 1983-04-01 US US06/481,237 patent/US4515397A/en not_active Expired - Fee Related
-
1984
- 1984-04-02 CA CA000451100A patent/CA1210342A/en not_active Expired
- 1984-04-02 EP EP84103622A patent/EP0123944B1/en not_active Expired
- 1984-04-02 WO PCT/US1984/000481 patent/WO1984003929A1/en active Application Filing
- 1984-04-02 DE DE8484103622T patent/DE3468269D1/en not_active Expired
- 1984-04-02 JP JP59501607A patent/JPS60500968A/en active Granted
- 1984-04-02 MX MX200878A patent/MX158379A/en unknown
- 1984-04-02 ES ES1984291537U patent/ES291537Y/en not_active Expired
- 1984-04-02 BR BR8406495A patent/BR8406495A/en not_active IP Right Cessation
- 1984-11-20 NO NO844612A patent/NO844612L/en unknown
- 1984-11-30 FI FI844731A patent/FI844731A0/en not_active Application Discontinuation
Patent Citations (16)
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US1565254A (en) * | 1924-04-01 | 1925-12-15 | Bystrom Albert Leonard | Pipe covering |
US2478552A (en) * | 1945-12-08 | 1949-08-09 | Alexander H Isenberg | Insulated pipe terminal |
US2930407A (en) * | 1957-06-10 | 1960-03-29 | Conley John | Insulated piping |
US3068026A (en) * | 1958-06-13 | 1962-12-11 | Gen Motors Corp | Cryogenic fluid transfer line coupling |
US3369826A (en) * | 1961-08-22 | 1968-02-20 | Union Carbide Corp | Cryogenic fluid transfer conduit |
US3146005A (en) * | 1961-12-04 | 1964-08-25 | Arrowhead Products | Vacuum insulated conduits and insulated joining means |
US3207533A (en) * | 1963-01-17 | 1965-09-21 | Donald A Van Gundy | Double bayonet insulated transfer line coupling |
US3344803A (en) * | 1964-11-19 | 1967-10-03 | Commissariat Energie Atomique | Device for connecting and sealing-off between two sections of a pipeline for conveying liquefied gas |
US3488067A (en) * | 1967-09-12 | 1970-01-06 | Gilbert Associates | Air cooled pipe penetrations in concrete walls |
US3744823A (en) * | 1971-03-01 | 1973-07-10 | Shaw Pipe Ind Ltd | High temperature pipeline joints |
US3854756A (en) * | 1973-04-19 | 1974-12-17 | Ric Wil Inc | Conduit system |
US3885595A (en) * | 1974-01-28 | 1975-05-27 | Kaiser Aerospace & Electronics | Conduit for cryogenic fluid transportation |
US4046407A (en) * | 1975-04-18 | 1977-09-06 | Cryogenic Technology, Inc. | Elongated cryogenic envelope |
FR2465947A1 (en) * | 1979-09-26 | 1981-03-27 | Bonnet Rene | Insulated box for pipeline valves and fittings - has metallic outer casing retaining insulating material with inner and outer split collars around enclosed pipeline |
US4332401A (en) * | 1979-12-20 | 1982-06-01 | General Electric Company | Insulated casing assembly |
US4415184A (en) * | 1981-04-27 | 1983-11-15 | General Electric Company | High temperature insulated casing |
Cited By (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4746147A (en) * | 1987-04-09 | 1988-05-24 | Ecw, Inc. | Pipe joint |
US5014752A (en) * | 1987-05-27 | 1991-05-14 | Zojirushi Vacuum Bottle Co., Ltd. | Nonfreezing pipe |
US4798405A (en) * | 1987-09-22 | 1989-01-17 | Mobil Oil Corporation | Assembly for electrically non-conductively interconnecting tube ends |
EP0459085A1 (en) * | 1990-05-18 | 1991-12-04 | Deutsche Aerospace AG | Joining method for vacuum-thermal insulation elements |
US6094922A (en) * | 1998-09-09 | 2000-08-01 | Ziegler; Alex R. | Vacuum-insulated refrigerant line for allowing a vaccum chamber system with water-vapor cryocoil compressor to be locatable outside cleanroom |
EP1125078A4 (en) * | 1998-10-28 | 2003-08-13 | Chart Inc | Vacuum insulated pipe |
US6257282B1 (en) * | 1998-10-28 | 2001-07-10 | Mve, Inc. | Vacuum insulated pipe |
EP1125078A1 (en) * | 1998-10-28 | 2001-08-22 | Mve, Inc. | Vacuum insulated pipe |
US6216745B1 (en) * | 1998-10-28 | 2001-04-17 | Mve, Inc. | Vacuum insulated pipe |
WO2000025054A1 (en) * | 1998-10-28 | 2000-05-04 | Mve, Inc. | Vacuum insulated pipe |
US6533334B1 (en) | 1999-10-13 | 2003-03-18 | Chart Inc. | Vacuum-jacketed bayonet pipe spool and pipe spool system for cryogenic fluid |
US6695358B2 (en) | 1999-10-13 | 2004-02-24 | Chart, Inc. | Controlled leak cryogenic bayonet pipe spool and system |
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Also Published As
Publication number | Publication date |
---|---|
WO1984003929A1 (en) | 1984-10-11 |
CA1210342A (en) | 1986-08-26 |
EP0123944B1 (en) | 1987-12-23 |
BR8406495A (en) | 1985-03-12 |
FI844731L (en) | 1984-11-30 |
DE3468269D1 (en) | 1988-02-04 |
EP0123944A1 (en) | 1984-11-07 |
MX158379A (en) | 1989-01-27 |
JPS60500968A (en) | 1985-06-27 |
ES291537Y (en) | 1987-03-01 |
NO844612L (en) | 1984-11-20 |
ES291537U (en) | 1986-05-01 |
FI844731A0 (en) | 1984-11-30 |
JPH033120B2 (en) | 1991-01-17 |
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